21268144

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{1627}}^1$

素因数の和:1697

約数の個数: 40

約数和(自身を含む): 44411840

約数和(自身を除く): 23143696

約数列:

[1, 2, 4, 8, 16, 19, 38, 43, 76, 86, 152, 172, 304, 344, 688, 817, 1627, 1634, 3254, 3268, 6508, 6536, 13016, 13072, 26032, 30913, 61826, 69961, 123652, 139922, 247304, 279844, 494608, 559688, 1119376, 1329259, 2658518, 5317036, 10634072, 21268144]

約数ペア:

[(1, 21268144), (2, 10634072), (4, 5317036), (8, 2658518), (16, 1329259), (19, 1119376), (38, 559688), (43, 494608), (76, 279844), (86, 247304), (152, 139922), (172, 123652), (304, 69961), (344, 61826), (688, 30913), (817, 26032), (1627, 13072), (1634, 13016), (3254, 6536), (3268, 6508)]